Means for promoting circulation of the fluid in steam-generators.



H. W. E. JOSLING.

MEANS FOR PROMOTING CIRCULATION OF THE FLUID IN STEAM GENERATORS.

APPLICATION FILED APR. 4. I9l8.

Patented Sept. 10,1918

3 SHEETS-SHEET I.

H. W. E. JOSLING.

MEANS FOR PROMOTING CIRCULATION OF THE FLUID IN STEAM GENERATORS.

APPLICATION FILED APR. 4. I918.

1 278' 4: 8. Y PatentedSept. 10,1918.

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MEANS FOR PROMOTING CIRCULATION OF THE FLUID IN STEAM GENERATORS. APPLICATION FILED APII.4, 1918.

1,278,478. Patented Se t. 10,1918.

3 SHEETS-SHEET 3.

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HAROLD W, E. JOSLING, OF WESTMINSTER, LONDON, ENGLAND, ASSIG-NOR TO PERFECTA BOILER CIRCULATOR LIMITED, OF WESTMINSTER, ENGLAND.

MEANS FOR PROMOTING CIRCULATION OF THE FLUID IN STEAM-GENERATORS.

Application filed April 4, 1918.

To all wkomit may concern:

Be it known that I, HAROLD WILLIAM ED- WIN J OSLING, of 89 Victoria street, Westminster, in the county of London, England, have invented certain new and useful Improved Means for Promoting Circulation of the Fluid in Steam-Generators of the Lancashire Type and other Tubular Heating Apparatus; and I do hereby declare the following to be a full, clear, and exact descrip tion of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to means for promoting the circulation of fluids in steam generators and other tubular heating apparatus, and applies more particularly to boilers of the Lancashire type. The invention is not, however, restricted to Lancashire boilers, but is applicable to other boilers such as, for instance, marine boilers.

Means for promoting the longitudinal circulation of water in steam boilers of the above type have been proposed,'such circulating means consisting of a hood, casing or the like fixed at a suitable height above the boiler fiues the said hood or casing sloping upwardly toward the back end of the boiler and having depending sides or wing portions which extend down between the outsides of the boiler lines and the adjacent sides of the boiler barrel; further such hood or casing has been provided with a back plate adjacent the front or fire door end of the boiler such back plate extending down to about the horizontal center line of the boiler flues.

It has been found that the circulation set up by the above mentioned known means for promoting circulation does not reach the back end of a boiler, such as a Lancashire boiler, the length of which is, for instance, about thirty feet and the diameter about seven or eight feet, the circulation set up in such a boiler being good for about threequarters of its length.

This invention has for its object to provide improved circulating apparatus of the general type above mentioned, the apparatus Specification of Letters Patent. Patented Sept. 10, 1918.

Serial No. 226,701.

according to this invention being however so constructed that or provided with means whereby eflicient movement or circulation of the water from one end of the boiler to the other with eflicient return flow from the back end of the boiler to the circulator or the front end of the boiler is obtained and maintained, eflicient provision being made for the return flow with the result that the fluid does not have atendency to pile up or to be checked at the far or back end of the boiler.

Further according to this invention an inclined hood, casing or cover plate is fixed over the boiler flues at the furnaces for the purpose of setting up and maintaining longitudinal circulation, this hood or casing being provided with a back plate which extends down to or approximately to the center line of the fines; oneside of this hood or casing, at its forward or outlet end, is blanked off or closed to a suitable extent by a plate, hereinafter referred to as a blanking-01f plate, and the said hood or casing is also provided along its sides or edges with depending plates or wings which extend down between the outsides of the boiler -flues and the adjacent sides or walls of the boiler, the wing or depending plate at the blanked-off or closed side of the hood being deeper or extending farther down in the boiler than the depending wing or plate at the opposite side of the hood or casing which shallower wing or plate is completely open at the forward or outlet end of the hood. It will therefore be understood that the forward or outlet end of the circulator hood is completely open with the exception of the portion closed or blanked off by the above mentioned blanking-off plate. Further according to this invention, in addition to the above mentioned blanking-off plate another plate, hereinafter called a deflector plate, is preferably provided, at the blanked ofl' side of the hood, which deflector plate extends forwardly to a suitable distance from the outlet end of the hood or circulator, this deflector plate sloping at a suitable angle toward the longitudinal center line of the boiler. This deflector plate may form an extension of or may be attached to i the aforesaid blanking off plate.

Further in the preferred embodiment of this invention the above mentioned depending side wings or plates form continuations of and extend'down in a curve from the flat or approximately flat and upwardly inclined top portion of the hood or casing, so that all objectionable angles are eliminated and the formation of eddies is thus prevented.

In order that the invention may be more readily understood and carried into effect reference is made to the accompanying drawings in which,

Figure 1 is an end view of a circulator, according to this invention, as applied to a boiler of the Lancashire type.

Fig. 2 is a longitudinal elevation and Fig. 3 a plan of the circulator.

Fig. 4 is a plan view of the boiler fitted with circulating apparatus according to this invention but with the upper part of the boiler barrel omitted. v

Like reference numbers indicate corresponding parts in the several figures of the drawings.

1 is the barrel of the boiler, and 2 are the boiler fines. On the furnace ends of the fiues 2 is mounted the circulator which consists of a hood or casing partially surround ing and common to both flues; as shown the top or central portion 3 of the circulator is fiat or approximately flat and the depending side portions or wings 4 and 5 are curved downwardly from the edges of the portion 3; further, as clearly shown in Figs. 1 and 2, the depending side or wing 5 at one side of the circulator is deeper and consequently extends farther down .in the boiler space,

' between the flue 2 and the adjacent wall or side of the boiler, then the depending side or wing 4 which, as shown in Fig. 1, terminates with its lower end or edge above the horizontal center of the fines 2. Where the construction of the boiler permits the side wing 5 would preferably be made to extend well below the center line of the flues. It will be understood that in any case the side wing 4 should be made of less depth than the wing 5.

As shown in Fig. 2 the hood or casing slopes upwardly from its end adjacent the furnace doors to its forward or outlet end.

6v is the back plate of the circulator which plate as shown extends down between the flues 2 and also extends down on the outside of the flues and thus closes the rear end of the circulator including the rear ends of the side wings 4 and 5. the 'hood or circulator,including the side wings,is formed are suitably curved at the rear end as indicated at 6*, Figs. 2 and 3, andthe'back plate 6 is suitably secured to The plates of which this curved end for instance by means of a flat bar or strap, or bars or straps 7 and bolts and nuts 8 the bars or straps being suitably curved to correspond with the form of the hood or circulator at its rear end.

9 is the hereinbefore mentioned blankingofi? plate which as shown partially closes the forward or outlet end'of the circulator hood at the deeper side wing 5. As shown in Fig. 1 this plate 9 extends only a short distance down theside wing 5 the portion of which below the edge 9 of the plate is open at the front. The plate 9 might be made to extend farther down and thus increase the closure of the wing 5 at the front; tests have howeverdemonstrated that with the plate 9 terminating with its lower edge 9 at or approximately at the position shown in Fig. 1 good results are obtained.

10 is the hereinbefore mentioned deflector plate which, in the example shown, isosccured by bolts and nuts to an ofi-set portion or flange 10 of the plate 9. This deflector plate extends forwardly from the outlet end of the circulator to any suitable distance toward the far end of the boiler. Tests have however demonstrated that for a boiler about thirty feet longgood results are obtained with a deflector plate which extends for a distance of about three to five feet from the outletend of the circulator, and which is set at the angle or approximately at the angle shown. The plate 10 might however be set at some other suitableangle depending upon the length of the boiler. The deflector plate 10 is, as hereinbefore mentioned, provided for the purpose of in suring effective direction of the water issuing from the outlet end of the circulator,

. are situated.

The hood or circulator is supported on the boiler flues 2 by suitable frames or supports. As shown there are two frames or supports built up of iron or steel bars 11, 11 and 12, 12 suitably formed and secured together, and to which the plates of which the hood or circulator is formed are suitably secured forinstance as shown by bolts and nuts 13, 13 the latter (13) acting as tie rods or stays which together with the bars 11, 11 and 12, 12 support the hood or circulator on the flues 2. The plates 3 forming the top or central portion of the circulator are secured to the outer or curved plates which are carried down to form the depending sides or wings 4 and 5 and to the bars 11 and.12 of the above-mentioned supporting frames by means of the box nuts 14 screwed on to the upper ends of the tie rods or-bolts 13 which project through holes in the outer plates 3. I

15 are handles suitably secured to the top or central portion of the circulator which portion is readily removable as a whole by unscrewing the box nuts 14 from the tie rods or bolts 13*.

As shown the bars 11 and 11 are secured together at their lower ends by bolts and nuts 16 these bolts being provided at their inner ends with flat heads or plates 16 which are riveted or bolted to the laterally projecting portions 11 of the bars 11*.

17 are the chains or cables by which the circulator is held in position on the flues 2 the ends of the said chains or cables being connected, for instance by hooks and eyes, to the above-mentioned supporting frames. As shown the ends of the cables 17 (Fig. 1) are connected to the-parts 11 of the bars 11. 18 is an ordinary screw coupling by which the cables or chains 17 can be adjusted. 19 are bolts securing the central plate 3 to the plates 3 on either side of the said central plate.

In constructing a circulator according to this invention the plates of which it is built are preferably made of such width that they can be readily passed through the manhole of the boiler, and the plates may be provided with slotted bolt holes so that plates of the same sizemay be used for boilers of various diameters.

The provision of the hereinbefore mentioned blanking 01f piece or plate 9, which to a suitable extent closes the front or outlet end of the circulator hood or casing at one side thereof, causes the outward flow of water to take place mainly or wholly along. one side of the boiler toward the back or far end thereof whence the water returns along the opposite side and along the bottom of the boiler to the circulator, the said blankingbfl' piece preventing outward flow of the water taking place along the side of the boiler at or near which the blanking-off piece is situated and conse quently enabling efficient, return flow 'to take place from the far end of the boiler to the circulator, the main return flow of Water from the far end of the boiler to the circulator however taking place, as in known circulating apparatus, along the bottom of the boiler or below the boiler flues. In order to assist the return flow from the far end of the boiler to the circulator the hereinbefore mentioned deeper depending plate or side wing 5 is provided at that side of the circulator hood or casing which is blanked off or closed at the outlet end as above mentioned. Further to insure effective outward flow of the water along one side of the boiler as above mentioned the deflector plate 10 is also provided.

The arrows in Fig. 4 of the drawings show approximately the course taken by the water in its outward flow from the circulator along one side of the boiler to the far end thereof, and also show approximately the course taken by the water in its return flow from the far end of the boiler to the circulator this return flow taking place, as shown by the arrows, along that side of the boiler at or near which the deeper side wing and the blanking-oil plate "of the circulator are situated and also, as

fluids in chemical industries.

What I claim as my invention and desire to secure by Letters Patent is 1. The combination, with two boiler fire flues arranged side by side, of a circulating device comprising a plate extending over both flues and having downwardly projecting wings of unequal depth at its sides, a

deflector secured at the outlet end of the device adjacent to the deeper wing and operating to cause the water when heated to flow diagonally over the flues, and a plate extending crosswise of the flues at the other end of the device.

2. The combination, with two boiler fire flues arranged side by side, of a circulating device comprising a plate extending over both fines and having downwardly projecting wings at its sides, a plate partially closing the outlet end of the device and arranged adjacent to one wing and over one flue and operating to cause the water when. heated to flow diagonally over the flues, and a plate extending crosswise of theflues and substantially closing the other end of the device.

3. The combination, with two boiler fire flues arranged side by side, of a circulating device comprising a plate extending over both flues and having downwardly project ing wings at its sides, a plate extending crosswise of and partially over one flue and secured adjacent to one of the said wings at the outlet end of the device, a deflecting plate secured to the last said plate and ar ranged diagonally over the said flue, and a plate extending crosswise of the flues and substantially closing the other end of the device.

4. The combination, with two boiler fire flues arranged side by side, of a circulating device comprising a plate extending over both flues and having downwardly project ing wings of unequal depth at its sides, a downwardly in the Water space between the deflector secured at the outlet end of the two flues. 10 device adjacent to the deeper wing and In testimony whereof I have affixed my operating to cause the water When heated signature, in presence of two'witnesses.

to flow diagonally over the flues, and a plate H. N. E. J OSLING. extending crosswise of the fiues at the other Witnesses:

end of the device between the said wings U. MOON,

and having a central portion Whichprojects H. PETER VENN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. I 

